With all the hundreds of altcoins who can keep them straight? Many of them are hybrids but lean toward PoS. Ethereum waffles but will probably be PoS. I should have looked up the names rather than pull them out of memory, but this topic makes me weary. I prefer to let the market decide.
Fair enough, but Ethereum is going to be PoW:
Ethereum will be a hashimoto dagger IO bound PoW consensus mechanism.
The latest under review is here under PoC7:
https://github.com/ethereum/cpp-ethereum/wikihttp://gavwood.com/Paper.pdf